C++ Primer, Fifth Edition

9.2.4. Defining and Initializing a Container

Every container type defines a default constructor (§ 7.1.4, p. 263). With the exception of array, the default constructor creates an empty container of the specified type. Again excepting array, the other constructors take arguments that specify the size of the container and initial values for the elements.

Initializing a Container as a Copy of Another Container

There are two ways to create a new container as a copy of another one: We can directly copy the container, or (excepting array) we can copy a range of elements denoted by a pair of iterators.

To create a container as a copy of another container, ...